I think that, in general, scientists should try to help us understand as much about the world around us as possible. However, that said, it isn't a free-for-all and there are often really knotty ethical & cultural considerations that need to be addressed - especially in the field of human medical research.
Personally I can only speak as an entomologist and, although I collect insects and am a great supporter of the need to collect in the wider interests of study, I temper that with a respect for life and I like to think that I wouldn't kill even an insect without some good reason. For instance, I might put out a malaise trap that catches 1000s of insects, which I later survey, identify and distribute to other experts in different fields ... but if a wasp comes into my house I will catch it and let it go without harming it
I thin that some questions should be reserched and answered but if the information could be harmful, it should be destroyed.
It is always good to explore the unknown but.... maybe Scientists should learn how to stop.
How would you knowi if something should be investigated if you don;t investigate it?
Everything should be on the table but we should have some regulation as to how gained knowledge should be used for the benefit of humanity and with no harm to anyone. How to regulate this is the next big question.